Let's work towards PID1 being purely single threaded again. Let's rework
asynchronous_close() on top of clone() with CLONE_FILES (so that we
can manipulate PID1's fd table correctly).
One less use of pthread_create() in PID 1.
This wraps glibc's clone() but deals with the 'stack' parameter in a
sensible way. Only supports invocations without CLONE_VM, i.e. when
child is a CoW copy of parent.
We use usec_t for storing time value, which is 64bit.
However, usleep() takes useconds_t that is (typically?) 32bit.
Also, usleep() may only support the range [0, 1000000].
This introduce usleep_safe() which takes usec_t.
While we are at it, replace the sloppy use of filename_is_valid() by the
less sloppy filename_part_is_valid() (as added by the preceeding
commit), since we don#t want to be too restrictive here. (After all,
version strings invalid as standalone filenames might be valid as part
of filenames, and hence we should allow them).
Add a helper filename_part_is_valid() which does half of what
filename_is_valid() does: it checks for valid chars and length, but does
not filter out ".", ".." and "", as these are OK as parts of filenames,
just not alone.
When we see a "\" in COMMENT state, we change the state to COMMENT_ESCAPE. When we got
a new character, we reset the state to COMMENT, but this character is not dispatched.
Usually the character is NEWLINE, if so we will stay in COMMENT state until we find
the next NEWLINE.
fix: https://github.com/systemd/systemd/issues/27975
When trying to log, if we fail we try to close the journal FD. If
it is bad, safe_close() will fail and assert, which will try to log,
which will fail, which will try to close the journal FD...
Infinite recursion looks very pretty live in gdb, but let's avoid
that by immediately invalidating the journal FD before closing it.
Guard the coverage-related shenanigans from g++ when building the one
C++ unit test we have, so we don't have to make it C++ compatible:
[1573/2109] Compiling C++ object test-bus-vtable-cc.p/src_libsystemd_sd-bus_test-bus-vtable-cc.cc.o
FAILED: test-bus-vtable-cc.p/src_libsystemd_sd-bus_test-bus-vtable-cc.cc.o
ccache c++ -Itest-bus-vtable-cc. ... -c ../src/libsystemd/sd-bus/test-bus-vtable-cc.cc
In file included from <command-line>:
../src/basic/coverage.h:17:15: error: ‘_Noreturn’ does not name a type
17 | static inline _Noreturn void _coverage__exit(int status) {
| ^~~~~~~~~
../src/basic/coverage.h:46:29: error: conflicting declaration of ‘int _coverage_execveat(int, const char*, char* const*, char* const*, int)’ with ‘C’ linkage
46 | #define execveat(d,p,a,e,f) _coverage_execveat(d, p, a, e, f)
| ^~~~~~~~~~~~~~~~~~
../src/basic/coverage.h:34:19: note: previous declaration with ‘C++’ linkage
34 | static inline int _coverage_execveat(
| ^~~~~~~~~~~~~~~~~~
../src/basic/coverage.h:46:29: error: declaration of ‘int _coverage_execveat(int, const char*, char* const*, char* const*, int) noexcept’ has a different exception specifier
46 | #define execveat(d,p,a,e,f) _coverage_execveat(d, p, a, e, f)
| ^~~~~~~~~~~~~~~~~~
../src/basic/coverage.h:34:19: note: from previous declaration ‘int _coverage_execveat(int, const char*, char* const*, char* const*, int)’
34 | static inline int _coverage_execveat(
| ^~~~~~~~~~~~~~~~~~
../src/basic/coverage.h:58:24: error: conflicting declaration of ‘int _coverage_execvpe(const char*, char* const*, char* const*)’ with ‘C’ linkage
58 | #define execvpe(f,a,e) _coverage_execvpe(f, a, e)
| ^~~~~~~~~~~~~~~~~
../src/basic/coverage.h:48:19: note: previous declaration with ‘C++’ linkage
48 | static inline int _coverage_execvpe(
| ^~~~~~~~~~~~~~~~~
../src/basic/coverage.h:58:24: error: declaration of ‘int _coverage_execvpe(const char*, char* const*, char* const*) noexcept’ has a different exception specifier
58 | #define execvpe(f,a,e) _coverage_execvpe(f, a, e)
| ^~~~~~~~~~~~~~~~~
../src/basic/coverage.h:48:19: note: from previous declaration ‘int _coverage_execvpe(const char*, char* const*, char* const*)’
48 | static inline int _coverage_execvpe(
| ^~~~~~~~~~~~~~~~~
[1582/2109] Compiling C object test-event.p/src_libsystemd_sd-event_test-event.c.o
ninja: build stopped: subcommand failed.
Doesn't really matter since the two unicode symbols are supposedly
equivalent, but let's better follow the unicode recommendations to
prefer greek small letter mu, as per:
https://www.unicode.org/reports/tr25
Apparently there are two µ symbols, accept both when parsing.
One is the greek small letter mu (μ) the other is the micro sign (µ).
Unicode recommendation considers both equivalent, and says use of greek
small letter mu is preferred. See:
https://www.unicode.org/reports/tr25
Hence accept both when parsing.
Inspired by: #28029
This is a rework of #24764 by Cristian Rodríguez
<crodriguez@owncloud.com>, which stalled.
Instead of assigning -1 we'll use a macro defined to INT_MAX however.
The kernel command line may contain newlines which kernel happily
accepts, but we'd ignore everything past the first newline. Let's fix
that by replacing read_one_line_file() with read_full_file().
This changes a boolean param into a proper bitflag field.
Given this only defines a single flag for now this doesn't look like
much of an improvement. But we'll add another flag shortly, where it
starts to make more sense.
Let's move this helper call from journald specific code to src/basic/,
so that we can use it from sd-journal.
While we are at it, slightly extend it to also cover container uids,
which are also routed to the system journal now.
This places the call in uid-alloc-range.[ch] which contains similar
functions that match UID ranges for specific purposes.
Lennart Poettering
Zbigniew Jędrzejewski-Szmek
Mike Yuan
Luca Boccassi
Yu Watanabe
Daan De Meyer
licunlong
zhmylove
Frantisek Sumsal
Frantisek Sumsal